The modern periodic table is an arrangement of all the elements known in accordance with their increasing atomic number and recurring chemical properties.
It is a tabular display of 118 chemical elements which consists of horizontal rows called periods and vertical columns are called groups.
All elements in a group have the same number of valance electrons, and in period elements have the same number of electron shells.
Group 8A:
This group is of Nobel gases.
They occupy the eighteenth group of the periodic table.
They are non-reactive gases as their valance shell is completely filled.
The noble gases or inert gases are Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), and Radon (Rn).